How Fast Does a Sugar Baby Watermelon Grow?

Updated February 21, 2017

A small, early maturing watermelon, Sugar Baby offers sweet red flesh. These melons develop rapidly, making them a good candidate for gardeners with short summers, since they're ready to eat after 10 weeks.

Time Frame

Sugar Baby watermelon takes 70 to 75 days to mature, making it an early harvest variety. It is among the melons with the shortest growth rate, which also include Yellow Baby and Golden Crown.


Sugar Baby melons average 2.72 to 4.54kg. at maturity, according to the University of Illinois Extension. Accordingly, these melons should gain 3/4 to 1lb. in weight per week.


Watermelons need high irrigation to develop properly. Texas A&M University suggests 10 to 15 inches of water over the 70 days, or 1 to 2 inches of water per week. All watermelons grow the best in sandy loam soils.


While you should use the 70 to 75 day time frame as a harvesting guideline, other clues tell you when to harvest. When the melon surface turns dull and the green curls on the stem end of your melon turn brown, it is ready to harvest.

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